3M 13627, 947, Hookit Disc Pad Holder, 7 in x 1 in x 5/8 in 5/8-11 Internal, 7000028353 
Insize 4770-600E, PERPENDICULARITY TESTER, 0-24″, 6928640359453
$9,656.02
Optional accessory: dial test indicators, cylinder square ( 4710, for calibration), granite square ( 4141, for calibration).
Range:0-24″
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